package cn.orange.ch07_binarytree;

import cn.orange.TreeNode;

/**
 * LC617.合并二叉树
 */
public class LC617 {
    public TreeNode mergeTrees(TreeNode root1, TreeNode root2) {
        if (root1 == null) return root2;
        if (root2 == null) return root1;
        TreeNode root = new TreeNode(root1.val + root2.val);
        root.left = mergeTrees(root1.left, root2.left);
        root.right = mergeTrees(root1.right, root2.right);
        return root;
    }

    public static void main(String[] args) {
        LC617 alg = new LC617();
        TreeNode root1 = new TreeNode(1);
        TreeNode root2 = new TreeNode(1, new TreeNode(2), null);
        TreeNode treeNode = alg.mergeTrees(root1, root2);
        System.out.println(treeNode);
    }
}
